diff --git a/cw5/zadanie1.cs b/cw5/zadanie1.cs
new file mode 100644
index 00000000..1a397f53
--- /dev/null
+++ b/cw5/zadanie1.cs
@@ -0,0 +1,34 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class castShadow : MonoBehaviour
+{
+    public bool refreshEverySecond = true;
+    public Environment environment;
+    public sbyte shadowStrength = 50;
+    Vector3 oldPosition;
+    void Start()
+    {
+    }
+    int frame = 0;
+
+    // Update is called once per frame
+    void Update()
+    {
+        if(frame == 2)
+        {
+        }
+        if(refreshEverySecond&&frame%60==0&&frame>60)
+        {
+            var newPosition = gameObject.GetComponent<Transform>().position;
+            if (oldPosition != newPosition)
+            {
+                environment.removeShadow(oldPosition, shadowStrength);
+                environment.addShadow(newPosition, shadowStrength);
+            }
+            oldPosition = newPosition;
+        }
+        frame++;
+    }
+}
diff --git a/cw5/zadanie2.cs b/cw5/zadanie2.cs
new file mode 100644
index 00000000..c7d63d93
--- /dev/null
+++ b/cw5/zadanie2.cs
@@ -0,0 +1,42 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class reciveShadow : MonoBehaviour
+{
+    public bool refreshEverySecond = true;
+    public Environment environment;
+    public sbyte shadowStrength = 5;
+    public Material inShadow;
+    public Material noShadow;
+    public byte displayShadowStrenth;
+
+
+    void Start()
+    {
+        displayShadowStrenth = environment.shadowStrength(transform.position);
+        if (displayShadowStrenth > shadowStrength)
+            gameObject.GetComponent<Renderer>().material = inShadow;
+        else
+            gameObject.GetComponent<Renderer>().material = noShadow;
+    }
+    int frame = 0;
+
+    // Update is called once per frame
+    void Update()
+    {
+        if(frame == 2)
+        {
+            
+        }
+        if(refreshEverySecond&&frame%60==0&&frame>60)
+        {
+            displayShadowStrenth = environment.shadowStrength(transform.position);
+            if (displayShadowStrenth > shadowStrength)
+                gameObject.GetComponent<Renderer>().material = inShadow;
+            else
+                gameObject.GetComponent<Renderer>().material = noShadow;
+        }
+        frame++;
+    }
+}
diff --git a/cw5/zadanie3.cs b/cw5/zadanie3.cs
new file mode 100644
index 00000000..e0ad6e5a
--- /dev/null
+++ b/cw5/zadanie3.cs
@@ -0,0 +1,282 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+using ConsoleLSystem;
+using System;
+using System.Linq;
+
+abstract public class TurtleLSystemEnvironment : TurtleLSystem {
+
+    public Environment environment;
+//    private LSystemEvaluator evaluator = null;
+//    private float nextStep;
+    public sbyte shadowStrength;
+    public int lookForLightAngle = 35;
+    public float lookForLightLength = 2.0f;
+    
+    public Matrix4x4 lightDirection(Matrix4x4 transformation, Matrix4x4 resultTransformation, GameObject shape, LSystemNode node)
+    {
+        int minShadow = 10000;
+        Matrix4x4 bestTransformation = transformation;
+        int maxShadowTries = 20;
+        int shadowRotate = 360/20;
+        int shadowStrength_ = 0;
+        bool clearShape = false;
+        if(shape == null)
+        {
+            clearShape = true;
+            shape = new GameObject("ShadowConeShape");
+        }
+        GameObject instance;
+        Matrix4x4 new_transformation = transformation;
+        foreach (GameObject gameObject in GameObject.FindGameObjectsWithTag("ShadowCone")) {
+            DestroyImmediate(gameObject);
+        }
+        Matrix4x4 objectTransformation = (transformation*resultTransformation);
+        int nr_shadow_str = 1;
+        //---------------------miejsce-na-zadanie-3.4--------------------------------------//
+
+        var strengths = new List<int>();
+        for(var x = -lookForLightLength; x < lookForLightLength; x =+ 0.5f)
+        {
+            for (var y = 0.0f; y < lookForLightLength; y = +0.5f)
+            {
+                for (var z = -lookForLightLength; z < lookForLightLength; z = +0.5f)
+                {
+                    var actualPosition = objectTransformation;
+                    actualPosition *= Matrix4x4.Translate(new Vector3(x, y, z));
+                    var shadowStrenght = (int)environment.shadowStrength(actualPosition.ExtractPosition());
+                    strengths.Add(shadowStrenght);
+                }
+            }
+        }
+
+        //---------------------miejsce-na-zadanie-3.4-koniec-------------------------------//
+        if (environment.sendShadowToLSystem)
+        {
+            //---------------------miejsce-na-zadanie-3.5--------------------------------------//
+            var avg = strengths.Average();
+            node.literal.values[1] = (float)avg;
+
+            //---------------------miejsce-na-zadanie-3.5-koniec------------------------------//
+        }
+        bestTransformation = transformation*resultTransformation;
+        if(environment.rotateTowardsLight)
+        {
+        minShadow = shadowStrength_;
+        if(shadowStrength_/nr_shadow_str > 5.0f)
+        {
+            shadowConeLimiter ++;
+    //        transformation = Matrix4x4.Translate(gameObject.transform.position)*transformation;
+            for(int angle = 0;angle <= lookForLightAngle;angle+=10)
+            {
+                for(int i = 0; i < 360; i += shadowRotate)
+                {
+                    shadowStrength_ = 0;
+                    for(float length = 0.5f; length<lookForLightLength; length+=environment.voxelSize*0.5f)
+                    {
+                        new_transformation = (transformation*(resultTransformation*Matrix4x4.Rotate(Quaternion.Euler(0, i, 0))*Matrix4x4.Rotate(Quaternion.Euler(0, 0, angle))*Matrix4x4.Translate(new Vector3(0,length,0))));
+                        shadowStrength_ += (int)environment.shadowStrength(new_transformation.ExtractPosition()+transformation.MultiplyPoint(shape.transform.position));
+//                        if(shadowConeLimiter % 10 == 0)
+//                        {
+//                        instance = Instantiate(environment.shape);
+//                        instance.name = "ShadowCone";
+//                        instance.tag = "ShadowCone";
+//                        instance.transform.position = new_transformation.ExtractPosition()+transformation.MultiplyPoint(shape.transform.position);
+//                        instance.transform.rotation *= transformation.ExtractRotation();
+//                        }
+                    }
+                    if(shadowStrength_ < minShadow)
+                    {
+
+                        minShadow = shadowStrength_;
+                        bestTransformation = (transformation*(resultTransformation*Matrix4x4.Rotate(Quaternion.Euler(0, i, 0))*Matrix4x4.Rotate(Quaternion.Euler(0, 0, angle))));
+                    }
+                }
+            }
+        }
+        if(minShadow > 220*lookForLightLength*2.0f)
+        {
+            bestTransformation = Matrix4x4.Translate(new Vector3(0,0,0));
+        }
+        }
+        if(clearShape)
+        {
+            DestroyImmediate(shape);
+        }
+        return bestTransformation;
+    }
+    public void evaluate() {
+        
+        base.evaluate();
+    }
+    public void evaluateAndPresent() {
+        evaluate();
+        present();
+//        Debug.Log(evaluator.lSystemString.ToString().Length);
+        //x.name = "aaa";
+       
+        //Instantiate(x,Matrix4x4.identity);
+    }
+    public void loadFile() {
+//        nextStep = Time.time;
+//        clearObjects();
+        var sr = new StreamReader(LSystemPath);
+        evaluator = LSystemFileParser.parseLSystem(sr);
+        sr.Close();
+        turtleInterpretation = new Dictionary<string, Func<float[], Tuple<GameObject, Matrix4x4>>>();
+        initLiteralInterpretation();
+    }
+    public void present() {
+        clearObjects();
+        createModelsRecursiveInEnviroment(evaluator.lSystemString, Matrix4x4.Translate(gameObject.transform.position/2.0f));//Matrix4x4.identity);
+    }
+    void refreshShadows()
+    {
+        environment.Reset();
+        foreach (GameObject gameObject in GameObject.FindGameObjectsWithTag("LSystemLiteral")) {
+           
+//            if(!isParentThisGameObject(gameObject))
+//            {
+                environment.addShadow(gameObject.GetComponent<Transform>().position, shadowStrength);
+//            }
+//            else
+//            {
+//                if(isParentThisGameObject(gameObject, 2))
+//                {
+//                    environment.addShadowPoint(gameObject.GetComponent<Transform>().position, 6);
+//                }
+//            }
+        }
+    }
+    bool isParentThisGameObject(GameObject gameObject, int depth = 3)
+    {
+        if(gameObject.transform.parent != null)
+        {
+            if(gameObject.transform.parent.gameObject == this.gameObject)
+            {
+                return true;
+            }
+            else
+            {
+                if(depth >= 0)
+                {
+                    return isParentThisGameObject(gameObject.transform.parent.gameObject, depth-1);
+                }
+            }
+        }
+        return false;
+    }
+    int objectCounter = 0;
+    int shadowConeLimiter = 0;
+    public int childrenCount(LSystemNode node, int depth = 3)
+    {
+        int c = 0;
+        if(node.children.Count > 0)
+        {
+            c += node.children.Count;
+            if(depth > 0)
+            {
+                foreach(LSystemNode child in node.children)
+                {
+                    c+= childrenCount(child, depth - 1);
+                }
+            }
+        }
+        return c;
+    }
+    public void createModelsRecursiveInEnviroment(LSystemNode node, Matrix4x4 transformation, int depth = 0)
+    {
+//        transformation *= Matrix4x4.Translate(gameObject.transform.position);
+        while (node != null && objectCounter < 25000) {
+            Matrix4x4 new_transformation=transformation;
+            Func<float[], Tuple<GameObject, Matrix4x4>> interpretation;
+            var name = node.literal.name;
+            if (turtleInterpretation.TryGetValue(name, out interpretation) || turtleInterpretation.TryGetValue("*.*", out interpretation)) {
+                var result = interpretation(node.literal.values);
+                Debug.Log("D: "+node.literal);
+                new_transformation = new_transformation*Matrix4x4.Rotate(Quaternion.Euler(UnityEngine.Random.Range(-0.5f, 0.5f), UnityEngine.Random.Range(-0.5f, 0.5f), UnityEngine.Random.Range(-0.5f, 0.5f)));
+                new_transformation = lightDirection(new_transformation, result.Item2, result.Item1, node);
+                
+                if(new_transformation == Matrix4x4.Translate(new Vector3(0,0,0)) && environment.cutBranchesWithMaxShadow)
+                {
+                    Debug.Log(" children "+node.children.Count);
+//                    node.literal.
+                    if(childrenCount(node) < 5)
+                    {
+                        LSystemNode destroyNode = node;
+                        if(destroyNode.parent != null)
+                        {
+                            destroyNode.parent.children.Remove(node);
+                            if(destroyNode.parent.mainChild == null)
+                            {
+                                destroyNode.parent.mainChild = destroyNode.parent.children[0];
+                            }
+                            node = node.mainChild;
+                            destroyNode = null;
+        //                    DestroyImmediate(instance);
+                            objectCounter--;
+                        }
+                        continue;
+                    }
+                }
+                if (result.Item1 != null && new_transformation != Matrix4x4.Translate(new Vector3(0,0,0))) {
+                    var instance = this.prepeareGameObject(name, result.Item1, new_transformation);
+                    environment.addShadow(new_transformation.ExtractPosition()+transformation.MultiplyPoint(result.Item1.transform.position), (sbyte)(shadowStrength/8.0f));
+                }
+
+                environment.addShadow(new_transformation.ExtractPosition()+transformation.ExtractPosition(), (sbyte)(shadowStrength/8.0f));
+                environment.addShadow((new_transformation*Matrix4x4.Translate(new Vector3(0,1,0))).ExtractPosition()+transformation.ExtractPosition(), (sbyte)(shadowStrength/8.0f));
+                //remove scale, rather unnecesary
+                new_transformation = new_transformation * Matrix4x4.Scale(result.Item2.ExtractScale()).inverse;
+            }
+            if(node != null)
+            {
+                List<ConsoleLSystem.LSystemNode> children_tmp = new List<ConsoleLSystem.LSystemNode>();
+                foreach (var child in node.children)
+                {
+                    children_tmp.Add(child);
+                }
+                foreach (var child in children_tmp)
+                {
+                    if(child != null)
+                    {
+                        createModelsRecursiveInEnviroment(child, new_transformation, depth+1);
+                    }
+                }
+                node = node.mainChild;
+            }
+            transformation = new_transformation;
+        }
+
+    }
+        
+    private void clearObjects() {
+        //var objects = Resources.FindObjectsOfTypeAll<GameObject>().Where(obj => obj.name == "Name");
+//        foreach (GameObject gameObject in GameObject.FindGameObjectsWithTag("LSystemLiteral")) {
+//            DestroyImmediate(gameObject);
+//
+//        }
+        objectCounter = 0;
+        int removed = 1;
+        while (removed > 0)
+        {
+            removed = 0;
+            foreach (Transform child in this.gameObject.transform) {
+//                environment.addShadow(gameObject.GetComponent<Transform>().position, (sbyte)-shadowStrength);
+                if(child.gameObject.tag == "LSystemLiteral")
+                {
+                    DestroyImmediate(child.gameObject);
+                }
+                removed ++;
+    //            GameObject.Destroy(child.gameObject);
+            }
+            
+        }
+        refreshShadows();
+//        gameObjects = new List<GameObject>();
+    }
+
+}
diff --git a/cw5/zadanie4.cs b/cw5/zadanie4.cs
new file mode 100644
index 00000000..8b5a533a
--- /dev/null
+++ b/cw5/zadanie4.cs
@@ -0,0 +1,45 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class GrowMultipleTrees : MonoBehaviour
+{
+    public TurtleEnvironment[] trees;
+    public int steps;
+    // Start is called before the first frame update
+    void Start()
+    {
+        trees = new TurtleEnvironment[9];
+        foreach(TurtleEnvironment tree in trees)
+        {
+            tree.loadFile();
+        }
+        var mainTree = trees[0];
+        for(var j = 0; j < 3; j++)
+        {
+            var position = new Vector3(-1, 0, -1);
+            for(var i = 0; i < 3; i++)
+            {
+                var newTree = mainTree;
+                newTree.transform.position = new Vector3(j, 0, i);
+                trees[i + j] = newTree;
+            }
+        }
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+    public void step()
+    {
+        for(int i = 0; i<steps;i++)
+        {
+            foreach(TurtleEnvironment tree in trees)
+            {
+                tree.evaluateAndPresent();
+            }
+        }
+    }
+}
diff --git a/cw5/zadanie5a.txt b/cw5/zadanie5a.txt
new file mode 100644
index 00000000..7bd5f219
--- /dev/null
+++ b/cw5/zadanie5a.txt
@@ -0,0 +1,20 @@
+#ignore + - \ / ^ &
+#axiom
+C(1,3)F(0,0)G
+#rules
+C(a,b) > F(x,c) : b<3 -> C(a,b+1)
+C(a,b) > F(x,c) : b>=3 -> #stochastic
+p=2 C(1,0,0)
+p=1 C(2,0,0)
+p=0.5 C(3,0,0)
+#stochastic end
+C(a,b) < F(x,0) : b>=3 -> F(a,0)
+F(x,0) < F(y,0) : x>0 -> F(x,0)
+F(x,0) : x>0 -> F(0)
+F(x,0) < G : x==1 -> F(0,0)[+B]\(137.5)G
+F(x,0) < B : x==2 -> #stochastic
+p=3 B
+p=1 G
+#stochastic end
+F(x,0) < G : x==3 -> F(x,0)W
+#end rules
\ No newline at end of file
diff --git a/cw5/zadanie5b.txt b/cw5/zadanie5b.txt
new file mode 100644
index 00000000..298a6bed
--- /dev/null
+++ b/cw5/zadanie5b.txt
@@ -0,0 +1,6 @@
+#ignore + - \ / ^ &
+#axiom
+S(0,0)
+#rules
+S(a,c)->F(0)-[[S(a+1,0)]+S(a+1,0)]+F(0)[+F(0)S(a+1,0)]-S(a+1,0)
+F(x) -> F(x+1)F(x+1)
\ No newline at end of file